Gregory Crowell has appeared as organist, harpsichordist, clavichordist, lecturer, and conductor in Germany, Holland, France, Italy, Spain, Japan, Canada, and the United States. He has performed in many international festivals and conventions, including the Boston Early Music Festival, four National Conventions of the Organ Historical Society, Region V Convention of the American Guild of Organists, the Saugatuck Chamber Music Festival, the Boston Clavichord Society, and numerous meetings of the Southeastern and Midwestern Historical Keyboard Societies. Particularly noted for his performances of the keyboard works of Johann Sebastian Bach, Crowell has been a featured performer at the Weener (Germany) International Bach Series, the Grand Rapids Bach Festival, the Grand Rapids Symphony Orchestra Bach Concerto Concerts, and the Old West (Boston) Bach Marathon. In the spring of 2000 Dr. Crowell was the only non-Japanese invited to perform and lecture in the Bach Organ Festival held at St. Luke's in Tokyo, during which time he also performed Minato Mirai Hall (Yokohama) and International Christian University (Tokyo-Mitaka), and served as Visiting Scholar at Rikkyo University. Broadcasts of Gregory Crowell's performances have been heard on MPR's Pipedreams, WCRB Boston, WGUC in Cincinnati, the Westdeutsche Rundfunk, and Belgian Public Radio; his compact disc recordings include live organ performances on the OHS label.

Gregory Crowell also enjoys collaborating with other musicians in chamber music, and he has appeared in concert with harpsichordists and organists Peter Sykes, Christa Rakich, Harald Vogel, and Guy Bovet, viola da gambist Emily Walhout, baroque cellist Pablo Mahave-Veglia, and baroque violinist Patricia Ahern. He regularly tours Europe and the United States with hornist Paul Austin, performing historical works for horn and organ, as well as works written for the duo by composers such as James Woodman, Bruce Saylor, and Robert Schechtman. Crowell's solo performances have been described as "beautiful, flexible, expressive" (The Diapason), "full of panache and expression" (Ostfriesen Kurier), "reliable as a sunrise, steady as a rock, especially in the virtuoso finale" (The Grand Rapids Press), and "this listener cannot recall ever having heard better" (The Boston Herald).

An avid researcher of eighteenth-century topics, Gregory Crowell has published articles in The American Organist, The Diapason, Clavichord International, Informazione organistica, De Clavicordio, Reformed Worship, Tangents, Japan Organ Society News, and other publications. He has been a featured lecturer at regional and national conventions of the American Guild of Organists, the International Clavichord Symposium in Magnano (Italy), the American Organ Archives, and meetings of the Midwestern and Southeastern Historical Keyboard Societies.

Dr. Crowell holds degrees from The New England Conservatory of Music and The University of Cincinnati, and has studied further at The North German Organ Academy, Academia del Organo (Pistoia, Italy), and Musika Hamabostaldia (San Sebastian, Spain).  He studied organ with Brigitte Dubiel, Yuko Hayashi, Bernard Lagac¿, Roberta Gary, and Harald Vogel, and harpsichord with Harald Vogel and Mireille Lagac¿. Dr. Crowell serves as Director of Publications for the Organ Historical Society, Director of Music at Trinity United Methodist Church in Grand Rapids,University Organist at Grand Valley State University in Allendale, Michigan, and President of the Midwestern Historical Keyboard Society.